Temperature sensing system

ABSTRACT

A temperature sensing device comprising a housing including a display, an extension at least 1.5 inches long extending from the housing, a temperature sensor, and a connector from the sensor to the housing for transmitting the output to the housing. The extension has a proximal section at the housing and an opposed distal section, the distal section being movable relative to the housing. The temperature sensor is at the distal section of the extension for sensing the temperature of a target material and providing an output related to the temperature of the target material. Optionally, the device includes a thermal insulator at the distal section of the extension protecting the temperature sensor from heat from the target material. Optionally, the device includes a light source at the distal section of the extension for aiming the sensor at the target material.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation and claims benefit to U.S. Utilitypatent application Ser. No. 17/135,323, titled, “Temperature SensingSystem”, filed Dec. 28, 2020, which claims the benefit of U.S.Provisional Patent Application Ser. No. 63/066,624, titled “TemperatureSensing System,” filed Aug. 20, 2020, the contents of which areincorporated by reference in their entirety.

BACKGROUND

In many systems, it is important to accurately measure the temperatureof a target material. For example, a system for vaporizing suchmaterials as botanical extracts includes a receptacle, commonly referredto as a banger, for holding the botanical extracts while it is vaporizedsuch as with a butane torch. If the target material is under heated,inadequate vaporization can occur. If it is overheated, burning canoccur.

Accordingly, there is a need for a temperature sensing device thataccurately measures the temperature of a heated targeted material.

SUMMARY

The invention is directed to a temperature sensing device having ahousing that includes a display, and an extension extending from thehousing by at least 1.5 inches. The extension has a proximal section atthe housing and an opposed distal section, the distal section beingmovable relative to the housing so that it can be brought near anappropriate location proximate to the target material. A temperaturesensor is at the distal section of the extension for sensing thetemperature of a target material. The target material can provide avapor when heated to a selected temperature. The temperature sensorprovides an output related to the temperature of the target material.There is a connector from the sensor to the housing for transmitting theoutput of the temperature sensor to the housing for display.

The device can have a light source at the distal section of theextension for aiming the sensor at the target material.

Optionally, the device has a thermal insulator at the distal section ofthe extension for protecting the temperature sensor fro a heat from thetarget material. The thermal insulator can have a first hole in thethermal insulator so that the temperature sensor is not covered by thethermal insulator. Optionally, the thermal insulator can have a secondhole in the thermal insulator so that the light source is not covered bythe thermal insulator.

The display can show the temperature sensed by the temperature sensor.

The device can further comprise a conversion circuit in the housing forconverting the output of the temperature sensor to the displayedtemperature.

The housing can have a selector key for inputting to the conversioncircuitry the container material constituted by a container containingthe target material for adjusting the displayed temperature based on theinfrared transmissivity of the container material.

The housing can also have an input key for setting a target temperatureof the target material and an alert generator for generating an alertwhen the target temperature is sensed by the temperature sensor.

The housing can also have a selector key for the type of material of acontainer containing the target material.

The housing can comprise a recess for receiving a banger cap.

The extension can be a flexible tube with the connector therein.Optionally, the extension is removable. Optionally, the device furthercomprises a replacement extension for changing out the removableextension.

Optionally, the device has memory for tracking the number of times thedevice has sensed the target temperature, and optionally, for storinghow much time it takes to reach the target temperature.

The device can be used by the steps of:

a) placing the target material into a container that is translucent ortransparent;

b) heating the target material to a temperature that generates a vaporfrom the target material; and

c) detecting the temperature of the target material with the device bymoving the extension relative to the housing to a location proximate tothe container.

The target material can be cannabis and the step of heating can compriseheating the cannabis to a temperature between 230 and 330 degreesCentigrade.

When the device has a light source generating a light beam at the distalsection of the extension for aiming the sensor at the target material,the method can comprise aiming the beam generated at the targetmaterial.

DRAWINGS

These and other features, aspects, and advantages of the presentinvention will become better understood with reference to the followingdescription, and the accompanying drawings and attachments where:

FIG. 1 is a perspective view of a temperature sensing device accordingto the present invention, with a banger held in a receiving recess ofthe device;

FIG. 2 is a front elevation view of the device of FIG. 1;

FIG. 3 is a top plan view of the device of FIG. 1;

FIG. 4 is a left side elevation view of the device of FIG. 1;

FIG. 5 is a sectional view of the device of FIG. 1 taken along line 5-5of FIG. 1;

FIG. 6 is a right side elevation view of the device of FIG. 1;

FIG. 7 is a sectional view of the device of FIG. 1, taken along line 7-7of FIG. 6;

FIG. 8 is an exploded view showing the components of the device of FIG.1;

FIG. 9 is a flow chart showing the programing by a user of the device ofFIG. 1;

FIGS. 10A-10M schematically show circuit diagrams for the circuits usedin the device of FIG. 1; and

FIG. 11 is a perspective view of use of the device of FIG. 1 with avaporizing rig.

DESCRIPTION

As used herein, the following terms and variations thereof have themeanings given below, unless a different meaning is clearly intended bythe context in which such term is used.

The terms “a,” “an,” and “the” and similar referents used herein are tobe construed to cover both the singular and the plural unless theirusage in context indicates otherwise.

As used in this disclosure, the term “comprise” and variations of theterm, such as “comprising” and “comprises,” do not exclude othercomponents or steps.

With reference to FIGS. 1-8, a temperature sensing device 200 havingfeatures of the present invention is shown. The temperature sensingdevice 200 includes a recess 202 for receiving a banger cap 204. Abanger cap 204 is a dabbing accessory that restricts airflow and trapsheat around domeless nails or bangers 205, allowing cannabis, such as acannabis concentrate 207, to vaporize at a lower temperature, preservingthe quality and flavor of the concentrate. With reference to FIG. 11,use of the temperature sensing device 200 is shown relative to astandard vaporizing rig 300 having a container (banger) 205 for holdingtarget material 207 to be heated. The banger cap 204 is placed on thebanger (container) 205 when a user is inhaling vapor from the heatedtarget material 207 and helps regulate airflow into the device 200.

Table 1, principally with regard to FIG. 8, presents the components ofthe device 200:

TABLE 1 ITEM NO. QTY. DESCRIPTION 100 1 HOUSING BASE 101 1 HOUSING COVER102 1 SENSOR BARREL LEFT 103 1 SENSOR BARREL RIGHT 104 1 BARREL CAP TOP105 1 BARREL CAP BOTTOM 106 1 SILICONE INSERT 107 1 SILICONE BARRELCOVER 108 1 BASE WEIGHT 109 1 PCB WITH A WEIGHT BRACKET 110 1 DISPLAYBRACKET 111 1 BARREL FLEXLINE 112 1 USB PORT 113 1 USER BUTTONS 114 3PCB CONTACTS FOR BUTTONS 115 1 MAIN PCB (printed circuit board) 116 1SENSOR PCB (printed circuit board) 117 1 OLED DISPLAY 118 1 BATTERY 1191 CABLE FROM PCB TO SENSOR 120 1 BARREL LED 121 1 TEMPERATURE SENSOR 1221 SENSOR TUBE 123 1 SENSOR COLLAR 124 1 PCB MOUNT SPEAKER 125 2 LOCKINGNUT 126 8 TORX SELF TAPPING SCREWS 127 4 ANTI SKID FOOT 128 2 HOLES ININSULATING COVER 129 1 SENSOR ASSEMBLY 130 1 SENSOR BARREL 131 1MICROPROCESSOR

The device 200 comprises a housing 206 formed of a housing base 100 anda housing cover 101 with a base weight 108 held in place by a weightbracket combined with a printed circuit board (PCB) 109 so the housingstays in position during use. The bottom of the housing base 100 hasantiskid feet 127. The housing cover 101 has an opening for an OLED(organic light emitting diode) display 117 held in place by a bracket110. The display 117 displays information from the device 200, includingbut not limited to battery level, a light alert indicator, a sound alertindicator, an LED guide indicator, temperature reading and degree scaleinformation, and banger type. The LED guide indicator assists the userin aligning the sensor 121 with the banger 205.

The printed circuit board 109 controls the main functions of the device200, creates the output from a sensor 121 and alerts the sound andlights to flash and ding upon set parameters. Also, within the housing206 is a circuit board 115 that houses a microprocessor 131 for runningthe functions of the entire system. The housing 206 includes a PCB mountspeaker 124 for sounding the sound alerts.

Contacts 114 are provided for the user buttons 113 to provide signals tothe main printed circuit board 115. User button 113 project upwardthrough the housing cover 101. Preferably, there are three user buttons113, as best seen in FIG. 9. The two upper buttons 113A, 113E permit theuser to scroll left and right through the menu. The bottom, centrallylocated button 113C is the power/menu/set button. The user buttons 113can be made from rigid or flexible plastic material or metal.

The housing cover 101 also includes a USB port 112 and a battery 118such as a rechargeable lithium battery. The battery 18 can be chargedusing the USB port 112. Optionally the device 200 can be provided with asocket for external power or in place of or as an option to the battery118. Components of the housing 206 are held together with Torx(trademark) tapping screws 126; however, other types of fasteners knownin the art may be used.

The device 200 includes a temperature sensor 121, namely an infraredsensor. The appropriate temperature sensor depends on the applicationfor which the device is used. For example, if used for heating cannabis,the temperature sensor 121 preferably is effective between 230 C-330degrees C. and a preferred sensor range is 93-425 degrees C.

A preferred temperature sensor 121 is a Heimann thermopile sensor. TheHeimann thermopile sensor is preferred because it comprises a CMOScompatible sensor chip plus a thermistor reference chip, goodsensitivity, a small temperature coefficient of sensitivity, and highreproducibility and reliability.

The sensor 121 has a storage temperature (meaning the temperature atwhich the sensor 121 can safely be stored at) of between −40 degrees C.to 100 degrees C., and an operating temperature (meaning the temperatureat which the sensor 121 can safely operate at) of between −20 degrees C.to 100 degrees C. Table 2 outlines the general and electrical parametersof the Heimann thermopile sensor 121:

TABLE 2 Limits Parameter Symbol Min Typ. Max Units Conditions elementsize 1.2*1.2 mm² absorbing area field of view (FOV) 16° @ 50% degreeFull FOV vs indicated Sv level 30° @ 10% Diagonal cut 34° @ 5%  Testedwith point source resistance R_(TP) 69 84 112 kΩ −40° C. to 100° C.signal voltage V_(s) 890  μV T_(amb) = 25° C., T_(BB) = 100° C., 4.5 Hz,distance 15 mm time constant τ 10  13 ms noise voltage V_(RMS) 37 nV/√Hzr.m.s., 25° C. pin insulation resistance R_(ISO) 30 GΩ 25° C., 50% RH,11 V, DC

Tables 3A and 39 outline the general and electrical parameters of thethermistor of the thermopile Heimann sensor 121:

TABLE 3A Type Thermistor 100 kΩ Limits Parameter Symbol Min. Typ. MaxUnits Conditions resistance R_(TH) 95 100 105 kΩ 25° C. BETA-value β3900 3940 3980 K 25° C./50° C.

TABLE 3B T/° C. Rth_min/Ohm Rth_nom/Ohm Rth_max/Ohm −30 1557900 16550001753100 −25 1163320 1234000 1306680 −20 875826 928700 981974 −15 665010704500 744190 −10 508730 538500 568370 −5 392108 414600 437292 0 304466321700 338934 5 238072 251400 264728 10 187444 197800 208056 15 148568156600 164632 20 118404 124800 131096 25 95000 100000 105000 30 7653780630 84713 35 62032 65380 68738 40 50543 53310 56077 45 41386 4368045984 50 34070 35980 37890 55 28174 29770 31366 60 23405 24750 26095 6519536 20670 21804 70 16383 17340 18297 75 13788 14600 15422 80 1165312350 13047 85 9890 10480 11080 90 8421 8930 9444 95 7197 7635 8076 1006172 6551 6935

Table 4 outlines the filter coating characteristic and lens parametersof the thermopile Heimann sensor 121:

TABLE 4 Filter F5.5 Limits Parameter min Typ Max Units Conditionsaverage transmission 75 % 7.5 μm to 13.5 μm absolute transmtssion 1 %visual to 5 μm cut on at 5% 5.2 5.5 5.8 μm 25° C. back focal 3.0 mmlength of lens

It is desirable that the temperature sensor 121 is proximate to a heatedtarget material 207. For this purpose, the device 200 has an extension220 that is at least 1.5 inches long and extends from the housing 206,where the extension 220 has a proximal section 222 at the housing 206and an opposed distal section 224, wherein the distal section 224 ismovable relative to the housing 206. The temperature sensor 121 is atthe distal section 224 of the extension 220 for sensing the temperatureof the target material 207 and providing an output related to thetemperature of the target material 207. This is best seen in FIGS. 5 and8. The extension 220 can be from about 3 to about 12 inches long so thatthe temperature sensor 121 is at least 1.5 inches and up to 12 inches,and preferably 7 inches, from the housing 206. Preferably, the extension220 is a flexible tube 111.

A sensor assembly 129, which is best seen in FIG. 8, includes the sensor121, a sensor tube 122 and a collar 123, with components held in placewith locking nuts 125. The sensor assembly 129 also includes a sensorbarrel 130 formed of wall components 102 and 103, a barrel cap topportion 104 and a barrel cap bottom portion 105. Wall components 102 and103 form two halves of the sensor barrel 130 that when coupled together,holding the remaining components of the sensor assembly 129, discussedin more detail below, therein. The sensor assembly 129 is located at thedistal section 224 of the extension 220.

Output from the temperature sensor 121 is related to the temperature ofthe target material 207, and is transmitted to a sensor printed circuitboard 116 via a cable 119 for transmission to the main sensor board 115.

The housing 206 includes a thermal insulating insert 106 and the sensorassembly 129 further includes a cover 107, wherein both the insulatinginsert 106 and the cover 107 are preferably made of silicone. This isfor protecting the sensor 121 from heat from the target material 207.The cover 107 is removable and remains on the sensor assembly 129(gripping an exterior surface of the wall components 102, 103) viafriction.

Preferably there is a light source such as a light emitting diode 120 aspart of the sensor assembly 129. This can be used for aiming the sensor121 at the target material 207 to be sure to get an accurate reading ofthe temperature of the target material 207.

Preferably the thermal insulating cover 107 has openings 128 for boththe temperature sensor 121 and the light source 120 so they are notcovered by the insulating material 107.

The housing 206 and other components can be formed of a plastic materialsuch as ABS or nylon. Silicone can be used as the insulating material.Also, silicone can be used as a cushion for the recess 202. Recess 202is configured to hold the banger cap 204 when the banger cap 204 is notin use. Silicone is desirable in recess 202 because the banger cap 204can get hot and sticky during use. Accordingly, the silicone linedrecess 202 provides a resting place for the banger cap 204 when not inuse that can handle both the heat and the stickiness of the used bangercap 204.

FIG. 9 shows a flow chart for programming the device 200 utilizing theuser buttons 113. The user buttons 113 are used to first power on thedevice 200, after which the main display screen 117 is shown. The usercan then use the buttons 113 to set a target temperature and set analert, such as a sound alert or a light alert or both so a user knowswhen the target temperature has been achieved. The alert indicates thatheating the target material 207 should stop. The user then selects thebanger type, completing the set-up and start-up of the device 200.

The user then lines up the sensor 121 with the banger 205. As notedabove, the sensor assembly 129 includes an LED. When the LED is on, itprovides a guiding beam of light. The beam should align with the edge ofthe banger 205 so that the sensor 121 is centered under the hanger 205.

The main circuit board 115 converts the output of the temperature sensor121 to the display temperature.

The device 200 can be provided with memory such as ram, rom, and flashmemory. The memory can be used for tracking the number of times thedevice 200 has sensed the target temperature. Memory can also be usedfor storing how much time it takes to reach the target temperature.

A feature of the present invention is an ability to adjust the outputfor the different type of container being used. As referred to in FIG. 9there is an option “select banger type”. For example, typical containersfor the target material can be made of quartz or opaque quartz. Theinfrared transmissivity of these two types of materials is different,and thus by using a user key referred to as a selector key, the type ofmaterial holding the target material 207 can be inputted into the maincircuit board 115 for adjusting the display temperature based on theinfrared transmissivity of the container material.

Referring now to FIGS. 10A-10M, there are shown circuit diagrams for thecircuits used in the device 200.

FIG. 10A shows a circuit for power management.

FIG. 10B shows a circuit for a VCC power supply.

FIGS. 10C and 10D show circuits for a sensor and peripheral compensationcircuit.

FIG. 10E shows a circuit for the MCU.

FIG. 10F shows a circuit for communication isolation resistance.

FIG. 10G shows the circuit for an MCU program burning interface.

FIG. 10H shows a circuit for a display driver chip.

FIG. 10I shows a circuit for a flash memory chip.

FIG. 10J shows a circuit for the three switches on the control ports.

FIG. 10K shows a circuit for the display module.

FIG. 10L shows a circuit for low voltage detection.

FIG. 10M shows a circuit for the display driver chip program programminginterface.

The purpose of the circuits shown in FIGS. 10A-10M and the functionsthey perform are the following:

1. Receive input signals from the temperature sensor 121;2. Convert the input signal from the temperature sensor 121 to atemperature for display on the display 117 of the housing 206;3. Accept user input to set the display for Centigrade or Fahrenheit;4. Turn the light (LED) on and off based on current temperature andtarget temperature;5. Receive user input to adjust the conversion of function 2 based onthe type of container for the target material 207;6. Receive user input to set a target temperature; and7. Turn on notification to the user such as sound or light or both tonotify the user that the target material 207 is at the targettemperature.

Use of the device 200 with a standard vaporizing rig 300 is shown inFIG. 11. The vaporizing rig 300 has a mouthpiece 302 and a container(banger) 205 having an open top 208. In use, a target material 207 thatgenerates a vapor when heated is placed into the container (banger) 205.The banger 205 can be translucent or transparent. The target material207 is heated to a temperature that generates a vapor, such as with abutane torch. The temperature of the target material 207 is detected bythe device 200, and this is effected by moving the extension 220relative to the housing 206 so the temperature sensor 121 is at alocation proximate to the container 205, such as 2 inches or less fromthe target material 207. Thus the height and angle of the sensor 121relative to the target material 207 can be changed. Once the desiredtemperature is reached, the user places the banger cap 204 onto/into theopen top 208 of the banger 205, and then the user inhales the vaporthrough the mouthpiece 302.

Although the invention has been described with regard to preferredversions, other versions are possible. For example, the device 200 canbe provided with a Bluetooth connection for use with a smart phone. Thesensor 121 can communicate wirelessly rather than be wired. Multipletemperature sensors 121 can be provided to determine the temperature ofmultiple target materials 207. The extension 220 can be removable suchas with fasteners (such as screws) so a first extension can be changedout for a second extension of a different length or for a differenttemperature sensor that is effective in a different temperature range.

The present invention has many advantages, including the following:

The device 200 is hands free, meaning, the housing base 100 is placed ona surface, such as a table top or desk top, and the temperature sensor121 can then be moved, via extension 224, independently of housing 206,into close proximity to the heated container 205 to be sensed. Thisconfiguration is ideal because the user does not have to hold the device200/sensor 121 steady and in place while the device 200 takes ittemperature readings. If the device 200 were hand-held, the device 200and sensor 121 would be unstable and subject to undesirable movementcaused by the users hands. Additionally, both of the user's hands arefree for dabbing, which is highly desirable.

Along the same lines, the flexible extension 224 allows the sensor 121to be in the position under the banger/container 205, and still have thedevice 200 facing the user so the user can view the display 117.

Device 200 has recess 202 for holding a banger cap 204. This isdesirable because after use, banger cap 204 is hot and sticky and due toits shape, cannot hold itself upright. Accordingly, recess 202 providesa safe and secure place to hold a hot and sticky banger cap 204 whilethe banger cap 204 is not in use.

The device 200 also has the ability to adjust the output for thedifferent type of container 205 being used. This is ideal because manyusers have different types of containers 205 made from differentmaterials and the device 200 can adapt accordingly.

The device 200 can be programmed or adapted to measure the time it takesfor the target material 207 to be heated to reaching the desiredtemperature and track that over time and when certain parameters aremet, the user can be alerted to replace the container 205. This isbecause the more times a container 205 is heated, the container 205loses the ability to transmit heat to the target material.

The device 200 can also track how many times a target material 207 (suchas a dab) has been heated and the effectiveness of different bangersover time. This would be valuable to an end user to see which brand ofbanger works best and to also make adjustments to the way they preparethe banger prior to dabbing.

While particular forms of the invention have been illustrated anddescribed, it will also be apparent to those skilled in the art thatvarious modifications can be made without departing from the spirit andscope of the invention.

The steps disclosed for the methods of use, for example, are notintended to be limiting nor are they intended to indicate that each stepis necessarily essential to the method, but instead are exemplary stepsonly. Therefore, the scope of the appended claims should not be limitedto the description of preferred embodiments contained in thisdisclosure.

1.-22. (canceled)
 23. A temperature sensing device comprising: a) a housing with a display; b) a flexible arm extending from the housing, the arm having a proximal section at the housing and an opposed distal section, the distal section being movable relative to the housing; c) an infrared temperature sensor at the distal section of the arm for sensing the temperature of a target material and providing an output related to the temperature of the target material; d) a connector disposed within the arm for transmitting the output from the temperature sensor to the display; e) a silicone thermal insulator coupled to the distal section of the arm; and f) an alarm configured to indicate when the temperature sensed by the temperature sensor is a target temperature of the target material or outside a designated temperature range.
 24. The device of claim 23, wherein the alarm comprises both a visual indicator and an audio indicator.
 25. The device of claim 23, wherein the housing comprises a base and a plurality of feet are coupled to the base for supporting the device on a surface.
 26. The device of claim 23, wherein the housing further comprises a plurality of keys configured for controlling the alarm and setting the designated temperature range.
 27. The device of claim 23, wherein the device further comprises a light at the distal section of the arm.
 28. The device of claim 23, comprising a hole in the thermal insulator so the temperature sensor is not covered by the insulator.
 29. The device of claim 23, wherein the display shows the temperature sensed by the temperature sensor.
 30. The device of claim 23, wherein the housing has an input key for setting the target temperature of the target material and the alarm generates an alert when the target temperature is sensed by the temperature sensor.
 31. A temperature sensing device comprising: a) a housing with a display; b) a flexible arm extending from the housing, the arm having a proximal section at the housing and an opposed distal section, the distal section being movable relative to the housing; c) an infrared temperature sensor at the distal section of the arm for sensing the temperature of a target material and providing an output related to the temperature of the target material; and d) a connector disposed within the arm for transmitting the output from the temperature sensor to the display.
 32. The device of claim 31, wherein the device further comprises a thermal insulator coupled to the distal section of the arm.
 33. The device of claim 32, wherein the thermal insulator is made of silicone.
 34. The device of claim 31, comprising a hole in the thermal insulator so the temperature sensor is not covered by the insulator.
 35. The device of claim 31, wherein the device further comprises an alarm configured to indicate when the temperature sensed by the temperature sensor is a target temperature or outside a designated temperature range.
 36. The device of claim 35, wherein the alarm comprises both a visual indicator and an audio indicator.
 37. The device of claim 31, wherein the housing comprises a base and a plurality of feet are coupled to the base for supporting the device on a surface.
 38. The device of claim 31, wherein the housing further comprises a plurality of keys configured for controlling the alai ii and setting a designated temperature range.
 39. The device of claim 31, wherein the device further comprises a light at the distal section of the arm.
 40. The device of claim 31, wherein the display shows the temperature sensed by the temperature sensor.
 41. The device of claim 31, wherein the housing has an input key for setting a target temperature of the target material and an alarm for generating an alert when the target temperature is sensed by the temperature sensor.
 42. A temperature sensing device comprising: a) a housing with a display; b) a flexible arm extending from the housing, the arm having a proximal section at the housing and an opposed distal section, the distal section being movable relative to the housing; c) an infrared temperature sensor at the distal section of the arm for providing an output related to the temperature of a target, wherein the arm can be moved so that the sensor can be proximate to the target; d) a connector disposed within the arm for transmitting the output from the temperature sensor to the housing; and e) a thermal insulator coupled to the distal section of the arm for protecting the temperature sensor from heat from the target.
 43. The device of claim 42, wherein the device further comprises an alarm configured to indicate when the temperature of the target is a target temperature or outside a designated temperature range, and the alarm comprises both a visual indicator and an audio indicator.
 44. The device of claim 42, wherein the housing comprises a base and a plurality of feet are coupled to the base for supporting the device on a surface.
 45. The device of claim 43, wherein the housing further comprises a plurality of keys configured for controlling the alarm and setting the designated temperature range.
 46. The device of claim 42, wherein the device further comprises a light at the distal section of the arm.
 47. The device of claim 42, comprising a hole in the thermal insulator so the temperature sensor is not covered by the insulator.
 48. The device of claim 42, wherein the housing has an input key for setting the target temperature of the target and an alarm generates an alert when the target temperature is sensed by the temperature sensor.
 49. The device of claim 42, wherein the target is cannabis. 